pakistan is a good example of a country where information sharing among known and suspected terrorists is still lacking. >> it is stunning that pakistan, which is supposed to be our ally in the war against terrorism, does not even share fingerprint data within its own government. it doesn't share it with other pakistanis -- pakistani law enforcement agencies. that's a real problem. >> reporter: so the bottom line is that we can pour billions of dollars into our airport security but the overall system, of course, is only as good as the weakest link, gregg. gregg: the senator said this issue is more now. what has changed in that regard? >> >> reporter: let's take the example of the underwear bomber, it's a good example of a foreign national, in this case a nigerian, who came through yemen and on to amsterdam before he boarded a flight on christmas day in 2009, the american cleric, anwar al-awlaki, the first american on the kill or capture list was the first man there, abdulmutallab, and the bomb maker. >> the threat is far more diverge than it was -- diverse than it was a decade ago. now